Enabling biosdevname (described at http://linux.dell.com/files/whitepapers/consistent_network_device_naming_in_linux.pdf) is an option for Ubuntu and has been since 11.04. It is not yet enabled by default, but it is an option that can be enabled by passing the "biosdevname=1" option at boot. I am not sure if it is desired to allow this feature in live images (such as the Ubuntu Cloud live image), but, if it is, it seems like there may be a couple of bugs one may encounter when doing so because of a couple files in the casper package:
dell@dhcp-164-224:~/precise/casper-1.312$ egrep -r "eth" * | egrep -vi "([a-z]eth|eth[a-z]|^test|^doc|^po|^man)"
debian/changelog: * Write /etc/network/interfaces entries for eth0, eth1, eth2, ath0 and
scripts/casper-bottom/23networking: for interface in /sys/class/net/eth* /sys/class/net/ath* /sys/class/net/wlan*; do
scripts/casper-bottom/23networking: for i in eth0 eth1 eth2 ath0 wlan0; do
scripts/casper-bottom/24preseed: chroot /root dhclient eth0 3>&- 4<&-
scripts/casper-bottom/24preseed: chroot /root ifconfig eth0 down
I am not familiar with how casper functions, so I'm not sure if this would be a bug or if these files in scripts/casper-bottom are harmless. I will note that on an Ubuntu Cloud live image that I tried, passing "biosdevname=1" did not do anything, so it may be that this is not possible for that build anyway.
This bug was fixed in the package casper - 1.327
---------------
casper (1.327) quantal; urgency=low
[ Tim Lunn ]
* add gnome-shell favorites tweak to 25adduser
* Add 16gdmnopasswd script, removes gdm password dialog for live user.
[ Stéphane Graber ]
* Fix casper when running on some RAID systems. (LP: #1047316, LP: #965735)
* Apply patch by Tyler Gates to try and better handle dm devices, should help
with the above change too. (LP: #865529)
* Use /sys/class/net/ instead of hardcoded eth* devices.
(LP: #905828, LP: #962546)
* Allow overriding username/
as is mentioned in the manpage but was never implemented.
Note that when using persistence, those used for the first boot will be
remembered through /etc/casper.conf (LP: #907482)
* Reset oem-config/enable to false every boot. (LP: #838680)
* Add Breaks/Replaces to ubiquity-casper to properly upgrade when both
casper and ubiquity-casper are installed. (LP: #1046300)
* Apply patch by cleary to avoid hang in 41apt_cdrom when .disk/info doesn't
exist. (LP: #909919)
* Eject by block device instead of mountpoint, this should avoid ejecting
the cdrom on USB installations. (LP: #869238)
* Add 'check' target to debian/rules based on ubiquity's (LP: #570243)
-- Stephane Graber <email address hidden> Wed, 03 Oct 2012 17:46:39 -0400